Question about Zenith IQB50M90W 50" Rear Projection Television

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Dark screen With some television shows and some dvd movies, it is so dark that it is hard to see. This does not happen with all programs, usually on ones that are shot in low lighting (night scenes, action movies)

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Re: dark screen

Your tubes are getting week, they can be adjusted up but will only make them weaker.

Posted on Jan 16, 2008

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Re: dark screen

Try to adjust your Contrast and Brightness settings to your desired option.ok??

Posted on Jan 15, 2008

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The brightness is very dark. Any nightime scene

Your CRT's getting old. Plus dust on lenses don't help much. You have to open front frill (below screen) and back of the TV. Clean up lenses using dry paper towels, do not wet.
In front of the TV after grill remove center cover and locate "black box" that have 6 potentiometers on it that looks like plastic adjustment screws for philips #2 screwdriver slots. 3 of them should read "Focus" These you don't touch. Another 3 reads "Screen". Put some still image on your screen (like paused DVD movie frame). Carefully add brightness in all 3 colors trying to avoid horizontal lines appearance. If lines show up, just turn it back a little. Try to keep color balance looking at the picture.
This procedure will brighten up image but further reduce CRT's life.

In case that you posted wrong model here and you have DLP Projection TV - just replace the lamp.

Mar 09, 2010 | Pioneer SD-643HD5 64" Rear Projection...

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It shows picture not in full screen like the movies black screen at top,in middle is the picture,black screen at bottom

If this happen on DVD's it is because the DVD is formated to Widescreen, 16x9 size, your TV is 4x3 size. Unless the Menu has an option of Picture size, or Format, to set to Full screen. there is nothing you can do other than be sure to check the DVD for picture format size before purchasing.

Sep 28, 2009 | Hitachi 43F300 43" Rear Projection...

1 Answer

Faint lines show up when i get dark screens in movies

First check what color of faint lines comes then reduce Screen Volts in TV of that CRT (tube)
Take off lower front cover, speaker grille of TV, there you will see focus control block that has 6 control knobs, upper 3 knobs are focus adjustment of red-green-blue CRTs and lower 3 knobs are screen volt controls for red-green-blue CRTs. Turn screen volt control knob CCW to reduce screen volts of desired CRT.
Put TV on any free AV input so screen will be dark enough to adjust screen volts.

Aug 28, 2009 | Sony KP-57WS500 57" Rear Projection...

1 Answer

I have a 57x500 Hitachi ultravision digital t,v,.....When we try to watch DVD Movies or vhs,the screen has the dark side bars on the side,,how do adjust the screen to make the movies fit on the screen so...

On your remote there should be a button that says "Aspect" or "Pic Size". Press thisuntil the video fills the screen. If you do not have the remote of don't have the original remote, this setting can be found by preesing the menu button on the tv, go down to video settings and it should be listed under "Aspect Ratio", change it untill the video fills the screen.

Dec 30, 2008 | Hitachi 57F500 57" Rear Projection...

1 Answer

Screen going black

It sounds like the set is loosing high voltage to the 3 crt's. This usually ends up being an expensive repair, if the parts are still available. A new, or at least newer, set might be money better spent.

Sep 28, 2008 | Mitsubishi WS-55819 55" Rear Projection...

1 Answer

Mitsubishi WD-52631 shadows and blurs in dark lit movies

If you are getting the same problem with both TV monitors it could then be assumed it's an input problem to the TV monitor. If you are using a digital output from your receiver it could be the cabling. If you are using an analog output from your receiver it is probably coming from the receiver.
Digital video processing does have issues with darker scenes.
Can you try another video source seperate from the receiver like a DVD or better yet an analog VHS, if you still have one. Good luck and let me know.

Sep 17, 2008 | Samsung HL-R6168W 61" HDTV

1 Answer

Mitsubishi WD-52631 shadows and blurs in dark lit movies

Good Day;
You may have a lamp going bad,when was the last time you replaced it? Or the DMD or light engine, try lamp first. Good Luck, big IRISH.

Sep 10, 2008 | Mitsubishi WD-52525 52" Rear Projection...

1 Answer

Green lines? Greenish tint to black colors on tv

ohh noooo call a good repair man...
tap on the green crt and check for liquid on the board

Feb 01, 2008 | RCA HD52W59 HDTV Projection Television

2 Answers


It could be a bad connection on the back with the cable try to tighten them up.

Jan 30, 2008 | Akai PT46DL10 46" HDTV-Ready Television

1 Answer

Hitachi 57F500, Dark areas

Hitachi dark problems at

Dec 27, 2007 | Hitachi 57F500 57" Rear Projection...

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